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Myocardial infarction with non-obstructive coronary arteries (MINOCA) has been defined as clinical presentation of an acute coronary syndrome with laboratory evidence of myocardial necrosis, but with coronary stenosis of less than 50% on coronary angiography. On the other side, myocarditis is an inflammatory response triggered by viral, bacterial, fungal, lymphocytic, eosinophilic, or autoimmune myocardial injury, which may be associated with elevated myocardial necrosis serum biomarkers. We present the case of a young male patient with acute chest pain, ST-segment elevation, and high-sensitivity troponin levels of 22,162 ng/L. [ABSTRACT FROM AUTHOR]

A relatively recent idea of extending the benefits of MIMO systems to multiuser scenarios seems promising in the context of achieving high data rates envisioned for future cellular standards after 3G (3rd Generation). Although substantial research has been done on the theoretical front, recent focus is on making Multiuser Multiple-Input Multiple-Output (MUMIMO) practically realizable. This paper presents an overview of the different MU-MIMO schemes included/being studied in 3GPP standardization from LTE (long-term evolution) to LTE Advanced. MU-MIMO system concepts and implementation aspects have been studied here. Various low-complexity receiver architectures are investigated, and their performance assessed through link-level simulations. Appealing performance offered by low-complexity interference aware (IA) receivers is notably emphasized. Furthermore, system level simulations for LTE Release 8 are provided. Interestingly, it is shown that MU-MIMO only offers marginal performance gains with respect to single-user MIMO. This arises from the limited MU-MIMO features included in Release 8 and calls for improved schemes for the upcoming releases.

The curved uncut chip thickness model is introduced to predict the cutting forces for general uncut chip geometries using the mechanistic approach. Classical geometric models assume that the cutting force is distributed along straight elementary sections of the uncut chip area, which has limited physical validity, but makes mathematical treatments easier for simple cases. The new model assumes that the flow of the material on the contact area of the tool is given by a continuous vector field, according to which the curved uncut chip thickness is measured. The cutting force is distributed along these paths, which leads to a mathematically unique and consistent solution for regular and complex cutting edge geometries. These curved paths can be generated by basic mechanical models, which mimic the more realistic motion of the chip segments along the rake face, without the need of explicit time-consuming cutting simulations. The presented computational procedure generalizes cutting force prediction based on geometric parameters, orthogonal cutting data and the orthogonal to oblique transformations only. The effectiveness of the model for various cutting edge geometries (e.g., thread turning inserts) under extreme cutting conditions is presented in case studies, laboratory and industrial experiments. [Display omitted] • The novel concept of the curved uncut chip thickness is introduced. • Cutting force is distributed along curved paths on the rake face of the tool. • The solution of the model is unique and free of inconsistency for complex geometries. • The method improves cutting force predictions at high feeds and extreme conditions. [ABSTRACT FROM AUTHOR]

Rationale: We have used a high-precision, high-efficiency method for the measurement of the 2 H/ 1 H ratios of hydrous silicates (amphiboles) and nominally anhydrous minerals (NAM) such as clinopyroxene, garnet and diamond, which are usually extremely resistant to pyrolysis. This opens up new fields of investigation to better understand the conditions of formation for deep-Earth minerals., Methods: The technique described here involves Isotope Ratio Mass Spectrometry (IRMS) on-line in continuous flow mode with an Elemental Analyser (EA) using "purge and trap" technology rather than separation by conventional packed column gas chromatography (GC). The system is equipped with a special high-temperature furnace reaching 1500°C, with a longer hot zone and improved temperature stability. Emphasis is put on the efficiency of the system to reliably pyrolyse refractory minerals difficult to analyse with other conventional systems., Results: While conventional systems usually fail to generate hydrogen suitable for isotopic analyses, with the technique presented here we were able to measure 2 H/ 1 H ratios from four diamond samples (δ 2 H = -60, -77, -84 and -79‰ V-SMOW; average SD = 4.5‰; n = 2), three garnet samples (δ 2 H from -70 to -63‰), and nine clinopyroxenes (δ 2 H from -92 to -58‰) associated with seven amphiboles (δ 2 H from -76 to -27‰) from single mantle rock., Conclusions: The possibility of using such a system to reliably measure 2 H/ 1 H ratios from refractory minerals, which are usually extremely difficult to analyse, offers a new tool of investigation for providing us with unrivaled clues to study the deep interiors of Earth., (Copyright © 2017 John Wiley & Sons, Ltd.)